CN115464998B - Thermal transfer printing carbon belt and preparation method thereof - Google Patents

Thermal transfer printing carbon belt and preparation method thereof Download PDF

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Publication number
CN115464998B
CN115464998B CN202211248434.4A CN202211248434A CN115464998B CN 115464998 B CN115464998 B CN 115464998B CN 202211248434 A CN202211248434 A CN 202211248434A CN 115464998 B CN115464998 B CN 115464998B
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China
Prior art keywords
parts
coating
thermal transfer
liquid
back coating
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CN115464998A (en
Inventor
嵇高晶
李辉
李顺
崔仲辉
任天航
伍衡
文添俊
孟佳成
唐国初
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Hunan Dingyi Zhizao Digital Equipment Technology Development Co ltd
Hunan Dingyi Zhiyuan Technology Development Co Ltd
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Hunan Dingyi Zhizao Digital Equipment Technology Development Co ltd
Hunan Dingyi Zhiyuan Technology Development Co Ltd
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Publication of CN115464998A publication Critical patent/CN115464998A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/426—Intermediate, backcoat, or covering layers characterised by inorganic compounds, e.g. metals, metal salts, metal complexes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/58—No clear coat specified
    • B05D7/586—No clear coat specified each layer being cured, at least partially, separately
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/385—Contact thermal transfer or sublimation processes characterised by the transferable dyes or pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
    • B41M5/395—Macromolecular additives, e.g. binders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/41—Base layers supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/423—Intermediate, backcoat, or covering layers characterised by non-macromolecular compounds, e.g. waxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • B41M5/443—Silicon-containing polymers, e.g. silicones, siloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20—Diluents or solvents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/30—Thermal donors, e.g. thermal ribbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/36—Backcoats; Back layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/38—Intermediate layers; Layers between substrate and imaging layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/40—Cover layers; Layers separated from substrate by imaging layer; Protective layers; Layers applied before imaging
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2429/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate

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  • Chemical & Material Sciences (AREA)
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  • Wood Science & Technology (AREA)
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  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

The invention relates to a thermal transfer printing carbon belt and a preparation method thereof, and belongs to the technical field of soft mark printing. The thermal transfer printing carbon belt comprises a back coating, a matrix, a release layer and an ink layer which are sequentially attached from top to bottom; the back coating is formed by coating after mixing the following raw materials in parts by weight: 150-250 parts of solvent, 15-30 parts of heat-resistant resin, 2-10 parts of cleaning filler, 0.2-1 part of lubricant, 0.2-0.5 part of dispersing agent, 0.2-0.5 part of antistatic agent and 5-10 parts of cross-linking agent. The invention also discloses a preparation method of the thermal transfer carbon ribbon. The beneficial effects are that: by adding the filler which can play a role in cleaning into the back coating liquid, the residues adhered on the printing head are physically scraped off, so that the printing head is protected.

Description

Thermal transfer printing carbon belt and preparation method thereof
Technical Field
The invention belongs to the technical field of soft mark printing, and particularly relates to a thermal transfer printing carbon belt and a preparation method thereof.
Background
Existing resin carbon tapes tend to produce residues that adhere to the printheads during continuous high-speed printing, resulting in degradation of print quality and even damage to the printheads. According to the invention, the filler with the cleaning function is added, so that residues adhered on the printing head can be cleaned during printing, and the service life of the printing head is prolonged. Principle of: in continuous printing, there is a build-up of temperature from the printhead, which results in the back-coating layer in contact with the printhead being extremely prone to residue, typically stripped resin or unreacted isocyanate curing agent, adhering to the printhead during continued operation. The self-cleaning filler is a metal soap which can melt and flow when heated to take away part of the residues, and is an inorganic particle which has a Mohs hardness less than 5 and can physically scrape off the residues adhered on the printing head, wherein the particle size of the inorganic particle needs to be greater than the thickness of the coating, so that the inorganic particle can protrude outwards to form a comb-like structure, and the generated residues are taken away when printing.
Therefore, a thermal transfer ribbon and a preparation method thereof are provided to solve the defects existing in the prior art.
Disclosure of Invention
In order to solve the technical problems, the invention provides the thermal transfer carbon belt, which has the function of protecting the printing head by adding the filler with the cleaning effect into the back coating liquid and physically scraping the residues adhered on the printing head.
The technical scheme for solving the technical problems is as follows: the thermal transfer printing carbon belt comprises a back coating, a matrix, a release layer and an ink layer which are sequentially attached from top to bottom;
The back coating is formed by coating after mixing the following raw materials in parts by weight: 150-250 parts of solvent, 15-30 parts of heat-resistant resin, 1 part of metal soap, 2-10 parts of cleaning filler, 0.2-1 part of lubricant, 0.2-0.5 part of dispersing agent, 0.2-0.5 part of antistatic agent and 5-10 parts of cross-linking agent;
The release layer is formed by mixing the following raw materials in parts by weight and then coating: 50-200 parts of solvent, 10-20 parts of first polyester resin and 2-5 parts of polyethylene glycol;
The ink layer is formed by mixing the following raw materials in parts by weight and then coating: 70-100 parts of solvent, 5-15 parts of second polyester resin, 5-10 parts of inorganic pigment and 0.5-1 part of solid particles.
The beneficial effects are that: by adding the filler which can play a role in cleaning into the back coating liquid, the residues adhered on the printing head are physically scraped off, so that the printing head is protected.
Description of principle: in order to be able to clean out the residue adhering to the print head during printing, it is necessary to add filler particles with a cleaning effect, which filler is able to physically scrape off the accumulated material adhering to the print head during printing. The filler is preferably kaolin, clay, mica and the like with Mohs hardness of less than 5 and particle size of more than 1um and less than 5um, and contains metal soap, wherein the melting point of the metal soap is preferably between 120 ℃ and 140 ℃, if the melting point of the metal soap is lower than the range, obvious effect cannot be achieved, and when the melting point of the metal soap is higher than the range, the defect of reduced printing quality exists, the metal soap can melt and flow during printing so as to take away part of residues adhered on a printing head, and the printing quality is greatly improved by matching with the cleaning filler.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the substrate is any one of a polyethylene terephthalate film, a1, 4-polycyclohexamethylene dimethylene terephthalate film, a polyethylene naphthalate film, a polyphenylene sulfide film, a polystyrene film, a polypropylene film, a polyethylene film, a polyvinyl chloride film, a nylon film, and a polyimide film.
The beneficial effects are that: the film is used as a base material, so that the back coating layer and the release layer can be effectively coated on the surface of the base material.
Further, the cleaning filler is any one of kaolin, clay, mica, silica, titanium oxide, zinc oxide, and silicone resin.
The beneficial effects are that: the residue adhering to the print head is physically scraped off, thereby functioning as a protection for the print head.
Further, the solvent is one or a mixture of two of 2-butanone and toluene.
The beneficial effects are that: the use of 2-butanone and/or toluene as solvents can ensure adequate dispersion and mixing of the components in the back coating, release layer and ink layer.
Further, the thickness of the substrate is 4-10 μm, the thickness of the back coating is 0.2-1.2 μm, the thickness of the release layer is 0.2-0.6 μm, and the thickness of the ink layer is 0.3-0.8 μm.
The beneficial effects are that: the thickness of the thermal transfer carbon ribbon can be ensured within the thickness range, and the adhesive force and the wear resistance to the base material are good.
Further, the lubricant is any one of silicone oil, polyethylene wax, paraffin wax, higher fatty acid ester, higher fatty amide and higher aliphatic alcohol; the dispersing agent is any one of anionic surfactant, cationic surfactant, nonionic surfactant and organic carboxylic acid; the antistatic agent is any one of long-chain alkyl quaternary ammonium salt, alkyl sulfonate, alkyl phosphoric acid, dithiocarbamate and ethoxylated aliphatic alkylamine; the cross-linking agent is isocyanate.
The beneficial effects are that: the lubricant reduces the friction resistance between the printing head and the base material and improves the lubrication effect; the dispersing agent improves the dispersibility of the coating component; antistatic agents increase the antistatic properties of the substrate; the adhesive improves the cohesiveness of the heat-resistant resin and the base material, and ensures the heat resistance and the stability of the coating.
Further, the inorganic pigment is carbon black; the solid particles are any one of silicon dioxide, zinc stearate and thermosetting acrylic acid particles.
The beneficial effects are that: the carbon black has good coloring effect, the solid particles can improve the lubricating effect, improve the adverse effect of high-temperature and high-humidity environment on the carbon tape in the storage and transportation processes, and ensure the normal printing quality.
The heat-resistant resin is any one of polyurethane-modified silicone resin, acrylic-modified silicone resin, polyvinyl acetal resin, and polyvinyl butyral resin.
The beneficial effects are that: the adverse effects such as stickiness or wrinkling caused by heating of the temperature-sensitive heating head during thermal transfer printing are prevented; a resin having a Tg of 90 ℃ or higher is preferable, and when the Tg of the resin is lower than this value, the heat resistance is markedly insufficient, and the tape breakage is caused at the time of printing. The molecular weight is preferably 70000-90000, the toughness of the coating is poor when the molecular weight is low, and the stability of the back coating liquid is poor when the molecular weight is too large.
The invention provides a preparation method of a thermal transfer carbon ribbon for achieving the second purpose, which comprises the following steps:
s1: preparing liquid:
back coating liquid: adding 10-30 parts of heat-resistant resin into 150-250 parts of solvent for dissolution, and then adding 2-10 parts of cleaning filler, 1 part of metal soap, 0.2-1 part of lubricant, 0.2-0.5 part of dispersing agent, 0.2-0.5 part of antistatic agent and 5-10 parts of cross-linking agent for stirring and mixing to prepare back coating liquid for later use;
And (3) releasing liquid: adding 5-35 parts of first polyester resin and 0.5-5 parts of polyethylene glycol into 50-200 parts of solvent for dissolution to prepare a release liquid for later use;
And (3) ink liquid: adding 5-15 parts of second polyester resin into 70-100 parts of solvent for dissolution, then adding 5-10 parts of inorganic pigment and 0.5-1 part of solid particles, and stirring and mixing to prepare ink liquid for later use;
S2: corona is performed;
providing a substrate, and beating corona on two sides of the substrate;
S3: coating;
coating the back coating liquid prepared in the step S1 on one surface of the substrate subjected to corona striking in the step S2, and then drying to form a back coating for later use;
then coating the release liquid prepared in the step S1 on one surface of the substrate far away from the back coating in the step S2, and drying to form a release layer;
And finally, coating the ink liquid prepared in the step S1 on one surface of the release layer far away from the substrate in the step S3 to obtain the thermal transfer carbon belt.
In the step S3, a ceramic anilox roller with 200-250 lines is adopted to coat back coating liquid, the coating speed is 60-100m/min, and the drying temperature is 60-100 ℃; coating release liquid by adopting a 230-250 line ceramic anilox roller, wherein the coating speed is 60-100m/min, and the drying temperature is 60-100 ℃; and coating release liquid by adopting a ceramic anilox roller with a line of 200-250, wherein the coating speed is 60-100m/min, and the drying temperature is 60-100 ℃.
The beneficial effects are that: the carbon tape prepared by the preparation method has the advantages that the filler with the cleaning effect is added into the back coating liquid, and residues adhered to the printing head are physically scraped, so that the printing head is protected, various base materials can be applied, the manufacturing cost of the carbon tape is low, and the process is simple and feasible.
Drawings
FIG. 1 is a schematic diagram of the layer structure of a carbon ribbon according to the present invention;
FIG. 2 is a template diagram of a print test of the present invention;
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1:
the embodiment provides a thermal transfer carbon ribbon, which comprises a back coating, a substrate, a release layer and an ink layer which are sequentially attached from top to bottom.
Wherein the matrix is polyethylene terephthalate with the thickness of 1-10 mu m;
The back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 5 parts of kaolin (particle size of 2 mu m), 1 part of metal soap, 0.5 part of reactive silicone oil, 2 parts of dispersing agent, 2 parts of antistatic agent and 8 parts of polyisocyanate;
The release layer is formed by coating the following raw materials in parts by weight: 43 parts of 2-butanone, 42.5 parts of toluene, 14 parts of first polyester resin (the molecular weight is between 3000 and 15000, the Tg value is between 50 and 100 ℃), and 2.5 parts of polyethylene glycol;
The ink layer is formed by coating the following raw materials in parts by weight: 40 parts of 2-butanone, 41 parts of toluene, 9 parts of a second polyester resin (molecular weight of 3000-20000, preferably 5000-15000, hydroxyl number >10mg/g, tg of 50-90 ℃), 6 parts of carbon black and 0.5 parts of filler particles.
Preparation of a thermal transfer ribbon:
corona is applied to one surface of the polyethylene terephthalate;
Taking materials according to the weight parts of the components of the back coating, and mixing to prepare back coating liquid;
coating back coating liquid on one corona surface of a first PET substrate by using a ceramic anilox roller with 200-250 lines, and drying at 60 ℃ for later use;
Taking materials according to the weight parts of the components of the release layer, and mixing to prepare release liquid;
Coating release liquid on one surface of the substrate, which is far away from the back coating, by using a 230-250-line ceramic anilox roller, and drying at 60 ℃ for later use;
and coating the ink liquid on one surface of the release layer far away from the matrix by using a ceramic anilox roller with 200-250 lines, and drying at the temperature of 60 ℃ to obtain the thermal transfer carbon belt.
Example 2:
This embodiment differs from embodiment 1 in that;
the back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 4 parts of kaolin, 1 part of mica, 1 part of metal soap, 0.5 part of reactive silicone oil, 2 parts of dispersing agent, 2 parts of antistatic agent and 8 parts of polyisocyanate.
Example 3:
This embodiment differs from embodiment 1 in that;
The back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 3 parts of kaolin, 2 parts of mica, 1 part of metal soap, 0.5 part of reactive silicone oil, 2 parts of dispersing agent, 2 parts of antistatic agent and 8 parts of polyisocyanate.
Example 4:
This embodiment differs from embodiment 1 in that;
The back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 3 parts of kaolin, 1 part of mica, 1 part of clay, 1 part of metal soap, 0.5 part of reactive silicone oil, 2 parts of dispersing agent, 2 parts of antistatic agent and 8 parts of polyisocyanate.
Example 5:
This embodiment differs from embodiment 1 in that;
The back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 3 parts of kaolin, 1 part of mica, 1 part of calcium carbonate, 1 part of metal soap, 0.5 part of reactive silicone oil, 2 parts of dispersing agent, 2 parts of antistatic agent and 8 parts of polyisocyanate.
Example 6:
This embodiment differs from embodiment 1 in that;
The back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 2 parts of kaolin, 2 parts of mica, 1 part of clay, 1 part of metal soap, 0.5 part of reactive silicone oil, 2 parts of dispersing agent, 2 parts of antistatic agent and 8 parts of polyisocyanate.
Example 7:
This embodiment differs from embodiment 1 in that;
The back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 2 parts of kaolin, 2 parts of mica, 1 part of calcium carbonate, 1 part of metal soap, 0.5 part of reactive silicone oil, 2 parts of dispersing agent, 2 parts of antistatic agent and 8 parts of polyisocyanate.
Example 8:
This embodiment differs from embodiment 1 in that;
The back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 2 parts of kaolin, 3 parts of calcium carbonate, 1 part of metal soap, 0.5 part of reactive silicone oil, 2 parts of dispersing agent, 2 parts of antistatic agent and 8 parts of polyisocyanate.
Example 9:
This embodiment differs from embodiment 1 in that;
The back coating is formed by coating the following raw materials in parts by weight: 100 parts of 2-butanone, 100 parts of toluene, 5 parts of polyurethane modified silicone resin, 5 parts of acrylic modified silicone resin, 10 parts of polyvinyl acetal resin, 10 parts of polyvinyl butyral resin, 2 parts of kaolin, 3 parts of clay, 1 part of metal soap, 0.5 part of reactive silicone oil, 2 parts of dispersing agent, 2 parts of antistatic agent and 8 parts of polyisocyanate.
Comparative example 1:
the substrate, back coat, release layer, ink layer, coating thickness, and process were the same as in example 1, but no metal soap was added to the back coat, and 3 parts of silica and2 parts of graphite were added.
Comparative example 2:
The substrate, back coat, release layer, ink layer, coating thickness, and process were the same as in example 1, but no metal soap was added to the back coat, and 3 parts of graphite and2 parts of polyethylene wax were added.
Comparative example 3:
the substrate, back coat, release layer, ink layer, coating thickness, and process were the same as in example 1, but no metal soap was added to the back coat, and 3 parts of polyethylene wax and 2 parts of aluminum hydroxide were added.
Comparative example 4:
the substrate, back coating, release layer, ink layer, coating thickness, and process were the same as in example 1, but no cleaning filler was added to the back coating.
Examples 1-9 and comparative examples 1-3 print performance tests of samples.
The resin carbon tape produced in this example was placed in an incubator using a label printer (model 105SLPlus manufactured by Zebra corporation) and subjected to loop measurement for 36 hours under conditions of-20 ℃/20%, 60 ℃/20% and 60 ℃/90% of temperature/humidity, respectively. Transferring lines (0.6 pt thick) shown in fig. 2 on dumb paper, coated paper and PP film; the printing speed was set at 12.7cm/s and the printing density was 25.
The formed image was visually confirmed, and evaluated by the following evaluation criteria:
A: no unprinted fine lines and fine dots are observed in the image;
b: some 3 or less unprinted thin lines and thin dots are observed in the image;
C: 3-20 or less unprinted thin lines and thin dots are observed in the image;
NG: more than 20 unprinted fine lines and fine dots were observed in the image.
After the loop measurement is finished, the adhesion condition of the front and the back of the carbon tape is observed, and the evaluation is carried out according to the following evaluation standard:
A: after the ring test is finished, the front and back surfaces of the carbon belt are not adhered and are not peeled off
B: after the ring test is finished, the front and the back of the carbon belt are slightly adhered and are not peeled off
C: after the ring test is finished, the front and the back of the carbon belt are slightly adhered and partially peeled
NG: after the ring measurement is finished, the front and back surfaces of the carbon ribbon are adhered in a large quantity and are partially peeled off
Test results:
In summary, according to the above-mentioned printing test results, examples 1 to 9 are compared with comparative example 4, and the cleaning filler particles are added into the back coating layer, so that the printing quality is improved, and the cleanliness of the printing head is ensured; by comparing examples 1-9 with comparative examples 1-4, the metal soap can melt and flow during printing to take away part of the residue adhering to the print head, and the cleaning filler is matched to greatly improve the printing quality.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.

Claims (8)

1. The thermal transfer printing carbon belt is characterized by comprising a back coating, a substrate, a release layer and an ink layer which are sequentially attached from top to bottom;
the back coating is formed by coating after mixing the following raw materials in parts by weight: 150-250 parts of solvent, 15-30 parts of heat-resistant resin, 1 part of metal soap, 2-10 parts of cleaning filler, 0.2-1 part of lubricant, 2 parts of dispersing agent, 2 parts of antistatic agent and 5-10 parts of cross-linking agent;
The release layer is formed by mixing the following raw materials in parts by weight and then coating: 50-200 parts of solvent, 10-20 parts of first polyester resin and 2-5 parts of polyethylene glycol;
The ink layer is formed by mixing the following raw materials in parts by weight and then coating: 70-100 parts of solvent, 5-15 parts of second polyester resin, 5-10 parts of inorganic pigment and 0.5-1 part of solid particles;
The cleaning filler is any one of kaolin, clay, mica, silicon oxide, titanium oxide, zinc oxide and silicone resin;
the Mohs hardness of the filler is less than 5, the particle size is more than 1um and less than 5um, and the melting point of the metal soap is between 120 ℃ and 140 ℃;
the lubricant is any one of silicone oil, polyethylene wax, paraffin, higher fatty acid ester, higher fatty amide and higher aliphatic alcohol; the dispersing agent is any one of anionic surfactant, cationic surfactant, nonionic surfactant and organic carboxylic acid; the antistatic agent is any one of long-chain alkyl quaternary ammonium salt, alkyl sulfonate, alkyl phosphoric acid, dithiocarbamate and ethoxylated aliphatic alkylamine; the cross-linking agent is isocyanate.
2. The thermal transfer ribbon of claim 1, wherein the substrate is any one of a polyethylene terephthalate film, a1, 4-polycyclohexylene dimethylene terephthalate film, a polyethylene naphthalate film, a polyphenylene sulfide film, a polystyrene film, a polypropylene film, a polyethylene film, a polyvinyl chloride film, a nylon film, and a polyimide film.
3. The thermal transfer ribbon of claim 1, wherein the solvent is one or a mixture of two of 2-butanone and toluene.
4. The thermal transfer ribbon of claim 1, wherein the substrate has a thickness of 4-10 μm, the back coating has a thickness of 0.2-1.2 μm, the release layer has a thickness of 0.2-0.6 μm, and the ink layer has a thickness of 0.3-0.8 μm.
5. The thermal transfer ribbon of claim 1, wherein the inorganic pigment is carbon black; the solid particles are any one of silicon dioxide, zinc stearate and thermosetting acrylic acid particles.
6. The thermal transfer ribbon of claim 1, wherein the heat resistant resin is any one of a polyurethane modified silicone resin, an acrylic modified silicone resin, a polyvinyl acetal resin, and a polyvinyl butyral resin.
7. A method of producing a thermal transfer ribbon according to any one of claims 1 to 6, comprising the steps of:
s1: preparing liquid:
back coating liquid: adding 15-30 parts of heat-resistant resin into 150-250 parts of solvent for dissolution, and then adding 2-10 parts of cleaning filler, 1 part of metal soap, 0.2-1 part of lubricant, 2 parts of dispersing agent, 2 parts of antistatic agent and 5-10 parts of cross-linking agent, stirring and mixing to prepare back coating liquid for later use;
and (3) releasing liquid: adding 10-20 parts of first polyester resin and 2-5 parts of polyethylene glycol into 50-200 parts of solvent for dissolution, and preparing release liquid for later use;
And (3) ink liquid: adding 5-15 parts of second polyester resin into 70-100 parts of solvent for dissolution, then adding 5-10 parts of inorganic pigment and 0.5-1 part of solid particles, and stirring and mixing to prepare ink liquid for later use;
S2: corona is performed;
providing a substrate, and beating corona on two sides of the substrate;
S3: coating;
coating the back coating liquid prepared in the step S1 on one surface of the substrate subjected to corona striking in the step S2, and then drying to form a back coating for later use;
then coating the release liquid prepared in the step S1 on one surface of the substrate far away from the back coating in the step S2, and drying to form a release layer;
And finally, coating the ink liquid prepared in the step S1 on one surface of the release layer far away from the substrate in the step S3 to obtain the thermal transfer carbon belt.
8. The method for producing a thermal transfer ribbon according to claim 7, wherein in step S3, a back coating liquid is coated with a 200-250 line ceramic anilox roller at a speed of 60-100m/min and at a temperature of 60-100 ℃; coating release liquid by using a ceramic anilox roller with a line of 230-250, wherein the coating speed is 60-100m/min; the temperature of the drying is 60-100 ℃; and coating the printing ink liquid on a ceramic reticulate roller by adopting 200-250 lines, wherein the coating speed is 60-100m/min.
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